body {
    background: #0d0d0d;
    color: white;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    flex-direction: column;
}

input, button {
    padding: 10px;
    font-size: 18px;
    margin-top: 10px;
}

#error {
    color: red;
    margin-top: 10px;
    display: none;
}